[flang-commits] [flang] [flang][OpenMP] Support custom mappers in target update to/from clauses (PR #169673)

[Akash Banerjee via flang-commits]

================

----------------
TIFitis wrote:

```
# .---command stderr------------
# | /home/akash/Documents/llvm-work/offload/test/offloading/fortran/target-declare-mapper-to-from.f90:68:11: error: CHECK: expected string not found in input
# |  ! CHECK: Sum of b with default mapper: 3000
# |           ^
# | <stdin>:3:36: note: scanning from here
# |  Sum of a with default mapper: 2000
# |                                    ^
# | <stdin>:4:2: note: possible intended match here
# |  Sum of b with default mapper: 0
# |  ^
# | 
# | Input file: <stdin>
# | Check file: /home/akash/Documents/llvm-work/offload/test/offloading/fortran/target-declare-mapper-to-from.f90
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1:  Sum of a after update from device: 1000 
# |             2:  Sum of b (never mapped): 10100 
# |             3:  Sum of a with default mapper: 2000 
# | check:68'0                                        X error: no match found
# |             4:  Sum of b with default mapper: 0 
# | check:68'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:68'1      ?                                possible intended match
# |             5:  Test passed! 
# | check:68'0     ~~~~~~~~~~~~~~
# | >>>>>>
# `-----------------------------
```


This test does not pass on AMDGPU in it's current state [c620237](https://github.com/llvm/llvm-project/commit/c6202377c731b5ee10b87695c50d66845379343c)

https://github.com/llvm/llvm-project/pull/169673